Update README.md

Author: tclose

README.md

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 # Pydra Dcm2Niix Task
 
-This repository aims to be the canonical set of Pydra tasks for incorporating
-A Pydra task interface for the dcm2niix DICOM to NIfTI converter tool (https://github.com/rordenlab/dcm2niix).
+This repository contains Pydra task interface for the `dcm2niix`
+DICOM to NIfTI converter tool (https://github.com/rordenlab/dcm2niix).
 
 Part of this effort is to establish a (mostly) declarative language for describing tasks that
 potentially have intricate rules for determining the availability and names from the choice of